People keep overratining Mii Brawler's Up-B 2 >_>. It's not that powerful guys, I tell ya. I mean of course, if you do it really close to the edge it can kill at like 60%, but so can a lot of f-smashes. On top of that, if you DI up (and you're not, like, Jigglypuff or wtv) you can live even after 70%, and after that Brawler can't actually combo into his UpB from Fair because of KBG.
The elevator can actually be DI'd out of as well, and with this I don't mean DIing the first hit so that you don't get hit by the second. If you DI the second hit down you can live even past 80 or 90% depending on how close to the ledge you are. If you're close to a side blastzone you're probably gonna die but because of the horizontal distance, which would have happened if you were hit by the reappearing hitbox of FW anyways, even if you were grounded.
The moves are very powerful, yeah, but they can be avoided in higher level play. You just have to know how to get out of them and where to DI.